package work1;

public class test3 {
	 public static void main (String args[]) {
	      byte b = 22; 
	      int  n = 129;  
	      float f =123456.6789f ;
	      double d=123456789.123456789;
	      System.out.println("b=  "+b);   
	      System.out.println("n=  "+n);
	      System.out.println("f=  "+f);   
	      System.out.println("d=  "+d); 
	      b=(byte)n;    //导致精度的损失.
	      f=(float)d;   //导致精度的损失
	      System.out.println("b=  "+b);   
	      System.out.println("f=  "+f); 
	   }

}
